<template>
    <div>
        <!-- 面包屑导航去 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 搜索与添加区域 -->
            <el-row :gutter="20">
                <el-col :span="8">
                    <el-input placeholder="请输入用户名称" v-model="queryInfo.query" clearable @clear="getUserList">
                        <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4"><el-button type="primary" @click="addDialogVisible = true">添加用户</el-button></el-col>
            </el-row>

            <!-- 用户列表区域 -->
            <el-table :data="userList" border stripe>
                <el-table-column type="index" label="序号"></el-table-column>
                <el-table-column label="姓名" prop="username"></el-table-column>
                <el-table-column label="邮箱" prop="email"></el-table-column>
                <el-table-column label="电话" prop="mobile"></el-table-column>
                <el-table-column label="角色" prop="role_name"></el-table-column>
                <el-table-column label="状态">
                    <template v-slot="{row}">
                        <el-switch v-model="row.mg_state" @change="userStateChanged(row)">
                        </el-switch>
                    </template>
                </el-table-column>
                <!-- 操作 -->
                <el-table-column label="操作" width="180px" min-width="175px">
                    <template v-slot="{row}">
                        <!-- 修改按钮 -->
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(row.id)"></el-button>
                        <!-- 删除按钮 -->
                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="delUser(row.id)"></el-button>
                        <!-- 分配角色按钮 -->
                        <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                            <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRoleDialog(row)"></el-button>
                        </el-tooltip>
                    </template>
                </el-table-column>
            </el-table>

            <!-- 分页区域 -->
            <el-pagination @size-change="handleSizeChange" 
                        @current-change="handleCurrentChange" 
                        :current-page="queryInfo.pagenum"
                        :page-sizes="[2, 3, 5, 6, 8, 10]" 
                        :page-size="queryInfo.pagesize" 
                        layout="total, sizes, prev, pager, next, jumper" 
                        :total="total">
            </el-pagination>

            <!-- 添加用户的对话框 -->
            <el-dialog title="用户添加" :visible.sync="addDialogVisible" width="50%"
            @close="addDialogClose">
                <!-- 内容主体区 -->
                <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
                    <el-form-item label="用户名" prop="username">
                        <el-input v-model="addForm.username"></el-input>
                    </el-form-item>
                    <el-form-item label="密码" prop="password">
                        <el-input v-model="addForm.password"></el-input>
                    </el-form-item>
                    <el-form-item label="邮箱" prop="email">
                        <el-input v-model="addForm.email"></el-input>
                    </el-form-item>
                    <el-form-item label="手机" prop="mobile">
                        <el-input v-model="addForm.mobile"></el-input>
                    </el-form-item>
                </el-form>
                <!-- 底部区 -->
                <span slot="footer" class="dialog-footer">
                    <el-button @click="addDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="addUser">添 加</el-button>
                </span>
            </el-dialog>

            <!-- 修改用户的对话框 -->
            <el-dialog title="修改用户信息" :visible.sync="editDialogVisible" width="50%" @close="editDialogClose">
                <!-- 内容主体区 -->
                <el-form :model="editForm" :rules="addFormRules" ref="editFormRef" label-width="70px">
                    <el-form-item label="用户名" prop="username">
                        <el-input v-model="editForm.username" :disabled="true"></el-input>
                    </el-form-item>
                    <el-form-item label="邮箱" prop="email">
                        <el-input v-model="editForm.email"></el-input>
                    </el-form-item>
                    <el-form-item label="手机" prop="mobile">
                        <el-input v-model="editForm.mobile"></el-input>
                    </el-form-item>
                </el-form>
                <!-- 底部区 -->
                <span slot="footer" class="dialog-footer">
                    <el-button @click="editDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="editUser">修 改</el-button>
                </span>
            </el-dialog>

            <!-- 角色分配 -->
            <el-dialog title="角色分配" :visible.sync="setRoleDialogVisible" width="50%" @close="setRoleDialogClose">
                <!-- 内容主体区 -->
                <div>
                    <p>用户的名字：{{ userInfo.username }}</p><br/>
                    <p>当前的角色：{{ userInfo.role_name }}</p><br/>
                    <p>分配新角色：
                        <el-select v-model="selectRoleId" placeholder="请选择角色">
                            <el-option v-for="item in rolesList" :key="item.id" :label="item.roleName" :value="item.id">
                            </el-option>
                        </el-select>
                    </p>
                </div>
                <!-- 底部区 -->
                <span slot="footer" class="dialog-footer">
                    <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                    <el-button type="primary" @click="setRole">确 定</el-button>
                </span>
            </el-dialog>

        </el-card>
    </div>
</template>

<script>
export default {
    data() {
        // 验证邮箱的规则
        var checkEmail = (rule, value, callback) => {
            // 验证邮箱的正则表达式
            const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/

            if(regEmail.test(value)) {
                // 邮箱合法
                return callback()
            }
            callback(new Error('请输入合法的邮箱'))
        }

        // 验证手机号的规则
        var checkMobile = (rule, value, callback) => {
            // 验证手机号的正则表达式
            const regMobile = /^(0|86|17951)?(13[0-9]|15[0123456789]|17[678]|18[0-9]|14[57])[0-9]{8}$/

            if (regMobile.test(value)) {
                // 邮箱合法
                return callback()
            }
            callback(new Error('请输入合法的手机号'))
        }

        return {
            // 获取用户列表的参数对象
            queryInfo: {
                // 搜索关键字
                query: '',
                // 当前页数
                pagenum: 1,
                // 每页展示几条数据
                pagesize: 2,
            },
            // 用户列表
            userList: [],
            // 总数据条数
            total: 0,
            // 控制添加用户对话框的显示与隐藏
            addDialogVisible: false,
            // 添加用户的表单数据
            addForm:{
                username: '',
                password: '',
                email: '',
                mobile: ''
            },
            // 添加表单的验证规则对象
            addFormRules: {
                username: [
                    {required: true, message: '请输入用户名', trigger: 'blur'},
                    {min: 3, max: 8, message: '用户名长度在3~8个字符之间', trigger: 'blur'},
                ],
                password: [
                    {required: true, message: '请输入密码', trigger: 'blur'},
                    {min: 6, max: 15, message: '用户名长度在6~15个字符之间', trigger: 'blur'},
                ],
                email: [
                    {required: true, message: '请输入邮箱', trigger: 'blur'},
                    {validator: checkEmail, trigger: 'blur'},
                ],
                mobile: [
                    {required: true, message: '请输入手机号', trigger: 'blur'},
                    {validator: checkMobile, trigger: 'blur'},
                ]
            },
            // 控制修改用户对话框的显示与隐藏
            editDialogVisible: false,
            // 查询到的用户信息
            editForm: {},
            // 控制角色分配对话框的显示与隐藏
            setRoleDialogVisible: false,
            // 需要被分配角色的用户信息
            userInfo: {},
            // 所有角色的信息
            rolesList: [],
            // 被选中的角色id
            selectRoleId: '',
        }
    },
    methods: {
        // 发送请求，获取用户列表
        async getUserList() {
            const { data : res} = await this.$http.get('users', {
                params: this.queryInfo
            })
            if(res.meta.status !== 200) return this.$message.error('获取用户列表出错！')
            this.userList = res.data.users
            this.total = res.data.total
            // console.log(res)
        },
        // 监听 pageSize（每页展示几条数据） 改变的事件
        handleSizeChange(newSize) {
            // console.log(newSize)
            this.queryInfo.pagesize = newSize
            this.getUserList()
        },
        // 监听 页数 改变的事件
        handleCurrentChange(newPage) {
            // console.log(newPage)
            this.queryInfo.pagenum = newPage
            this.getUserList()
        },
        // 监听到 Switch 开关状态的改变
        async userStateChanged(userinfo) {
            console.log(userinfo)
            const { data: res } = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`)
            if(res.meta.status !== 200) { 
                userinfo.mg_state = !userinfo.mg_state
                return this.$message.error('更新用户状态失败')
            } 
            this.$message.success('更新用户状态成功!')
        },
        // 监听添加用户对话框的关闭事件并重置
        addDialogClose() {
            this.$refs.addFormRef.resetFields()
        },
        // 点击按钮，发送请求，添加用户
        addUser() {
            this.$refs.addFormRef.validate(async valid => {
                // 预验证为 false 时
                if(!valid) return
                // 发起添加用户的网络请求
                const { data : res } = await this.$http.post('users', this.addForm)
                
                if(res.meta.status !== 201) return this.$message.error('添加用户失败！')
                this.$message.success('添加用户成功！')
                // 添加成功后隐藏表单
                this.addDialogVisible = false
                // 重新渲染列表
                this.getUserList()
                console.log(res)
            })
        },
        // 展示修改用户的对话框并根据id查询数据
        async showEditDialog(id) {
            const { data: res } = await this.$http.get(`users/${id}`)
            if(res.meta.status !== 200) return this.$message.error('获取用户信息失败！') 
            this.editForm = res.data
            // console.log(id, res)
            // 显示修改用户框
            this.editDialogVisible = true
        },
        // 监听修改用户对话框的关闭事件并重置
        editDialogClose() {
            this.$refs.editFormRef.resetFields()
        },
        // 修改用户
        editUser() {
            this.$refs.editFormRef.validate(async valid => {
                // 预验证为 false 时
                if (!valid) return
                // 发起添加用户的网络请求
                const { data: res } = await this.$http.put('users/' + this.editForm.id,
                { 
                    email: this.editForm.email,
                    mobile: this.editForm.mobile
                })
                if (res.meta.status !== 200) return this.$message.error('更新用户失败！')
                // 添加成功后隐藏表单
                this.editDialogVisible = false
                // 重新渲染列表
                this.getUserList()
                this.$message.success('更新用户成功！')
                // console.log(res, this.editForm.id)
            })
        },
        // 根据id删除用户
        async delUser(id) {
            // 弹框提示是否删除用户
            const confirmResult = await this.$confirm(
                '此操作将永久删除该用户, 是否继续?',
                '提示', 
                {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err=> err)
            
            // 如果用户确认删除，则返回值为字符串 confirm
            // 如果用户取消了删除，则返回值为字符串 cancel
            console.log(confirmResult)
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除')
            }
            const { data : res } = await this.$http.delete('users/' + id)
            if (res.meta.status !== 200) return this.$message.error('删除用户失败！')
            this.$message.success('删除用户成功！')
            // 重新渲染列表
            this.getUserList()
            // console.log(res)
        },
        // 展示角色分配框
        async showSetRoleDialog(userInfo) {
            this.userInfo = userInfo
            // 在展示对话框之前，获取所有角色列表
            const { data : res } = await this.$http.get('roles')
            if(res.meta.status !== 200) return this.$message.error('获取角色信息失败')
            this.rolesList = res.data
            this.setRoleDialogVisible = true
        },
        // 角色分配
        async setRole() {
            const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, 
            {
                rid: this.selectRoleId
            })
            if(res.meta.status !== 200) return this.$message.error('角色分配失败')
            this.$message.success('角色分配成功')
            this.getUserList()
            this.setRoleDialogVisible = false
        },
        setRoleDialogClose() {
            this.selectRoleId = ''
            this.userInfo = {}
        }
    },
    created() {
        this.getUserList()
    }
}
</script>

<style lang="less">
.el-card{
    box-shadow: 0 1px 1px rgba(0,0,0,0.15);
}
</style>